And the priest shall take [some] of the blood of the trespass
According to the Misnah F18, two priests received the blood of it, one in a vessel and the other in his hand; he that received it in a vessel went and sprinkled it upon the wall (or top, as Maimonides F19) of the altar; and he that received it in his hand went to the leper, and the leper having dipped himself in the chamber of the lepers, went and stood in the gate of Nicanor:
and the priest shall put [it] upon the tip of the right ear of him that
is to be cleansed, and upon the thumb of his right hand, and upon the
great toe of his right foot;
as was done at the consecration of the high priest, (See Gill on Exodus 29:20), (See Gill on Leviticus 8:24): now as the leper stood at the door of the tabernacle without the court, he was obliged to put in his head, his right hand, and his right foot, in order to have the blood put on them by the priest, who was in the court; and these were put in either separately one after another, or together: the tradition runs thus F20, he (the leper) thrust in his head, and (the priest) put (the blood) upon the tip of his ear; his hand, and he put it upon the thumb of his hand; his foot, and he put it upon the great toe of his foot: and the application of the blood to these parts showed that the leper had now a right to hear the word of God, to partake of all privileges, to touch anything without defiling it, and to go into any house or company where he thought fit, he was now at full liberty; more evangelically these things may signify the sanctification and cleansing of those parts, and of the whole man by the blood of Christ; and particularly may signify, that as the ear is unclean, uncircumcised, and unsanctified in a leprous sinner and even there are hearing sins in the best of men, the ear is sanctified, and hearing sins removed by the blood of Christ; and as the right hand, being the instrument of action, may denote the evil works of men, and even since the most righteous performances of the best of men are attended with sin, the blood of Christ, which cleanses from all sin, had need to be put upon them; and whereas the conversation of then, which the foot may be an emblem of, is sinful and vain, it is by the blood of Christ that they are redeemed from it; and the influence of that blood sprinkled on the conscience will oblige and constrain men to live and walk soberly, righteously, and godly.
F18 Ut supra. (Misn. Negaim, c. 14. sect. 8)
F19 Ut supra. (Hilchot Mechosre Capharah, c. 4. sect. 2.)
F20 Ut supra, (F18) sect. 9.